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Finding the Fourth Proportional to 68,768.70, 103,087.14 and 43,731.24

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Solution

The fourth proportional to 68,768.70, 103,087.14 and 43,731.24 is: 65,554.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,768.70 : 103,087.14 = 43,731.24 : x
  2. Step 2: Convert to fraction form
    68,768.70/103,087.14 = 43,731.24/x
  3. Step 3: Cross multiply
    68,768.70x = 103,087.14 × 43,731.24
  4. Step 4: Simplify right side
    68,768.70x = 4,508,128,460.25
  5. Step 5: Solve for x
    x = 4,508,128,460.25/68,768.70
  6. Step 6: Final answer
    x = 65,554.95

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.